Influence of hydrostratigraphy and structural setting on the arsenic occurrence in groundwater of the Cimino-Vico volcanic area (central Italy)

Angelone, Massimo; Cremisini, Carlo; Piscopo, Vincenzo; Proposito, Marco; Spaziani, Fabio

doi:10.1007/s10040-008-0401-3

Cited by 66 publications

(55 citation statements)

References 35 publications

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“…The waters which outflow from springs of the perched aquifer and dome-impounded groundwater are characterized by limited length of the flow path (in the order of a few kilometers), since they are located at higher altitudes, closer to the main recharge area. In contrast, the waters of the basal aquifer have longer paths in volcanic rocks (in the order of some tens of kilometers); even longer paths characterize the thermal waters that circulate in the sedimentary substrate of volcanics [17,34,36]. Chemical characteristics of groundwater are coherent with this hydrogeological model.…”

Section: Geological and Hydrogeological Frameworkmentioning

confidence: 66%

“…Numerous data about the arsenic contents of groundwater in the study area and its surroundings are available in the literature [5,16,17,36]. Other unpublished data were acquired by the Italian National Institute of Health (ISS), by the local water management company (Talete SpA, Viterbo, Italy), and by the regional environmental protection agency (ARPA Lazio, Rieti, Italy).…”

Section: Materials Data and Methodsmentioning

confidence: 99%

“…In contrast, the waters of the perched and basal aquifers comprise fresh, cold waters of the bicarbonate alkaline earth type (electrical conductivity generally between 100 μS/cm and 1000 μS/cm, temperature generally between 13 °C and 20 °C, tritium concentrations between 8 TU and 11 TU). In the hydrothermal area of Viterbo, the reduced thickness of the low-permeability layer that divides the basal aquifer from the deeper aquifer and its hydraulic heterogeneity give rise to a flow between the two overlapping aquifers and then to mixing between cold and thermal waters [17,[36][37][38][39]. All waters exhibit …”

Section: Geological and Hydrogeological Frameworkmentioning

confidence: 99%

“…As a matter of fact the highest arsenic concentrations (from 180 µg/L to 370 µg/L) were found in the thermal waters. The arsenic concentration in groundwater of the volcanic aquifer of the Cimino-Vico system, widely used for local drinking water supply and for irrigation, is variable from 1 µg/L to 100 µg/L [17,18]. The distribution of the geogenic contaminant was explained through the complexity of the hydrostratigraphy, the structural setting of the area, and the related mixing occurring between water circulating in the basal volcanic aquifer and the fluids that rise from depth, all of which characterize the active hydrothermal system.…”

Section: Introductionmentioning

confidence: 99%

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An Integrated Approach to Identify Water Resources for Human Consumption in an Area Affected by High Natural Arsenic Content

Armiento

Baiocchi

Cremisini

et al. 2015

Water

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This study concerns the occurrence of arsenic in the groundwater system of the Cimino-Vico volcanic area (central Italy), different parts of which are currently widely used for local drinking water supply and for irrigation. The system shows a complex groundwater circulation, including a continuous basal aquifer, discontinuous perched aquifers, groundwater flows at high altitude, and local interactions with rising thermal fluids. Data on arsenic contents in 250 water samples from springs and wells and in 68 samples from rock outcrops were measured and combined with already existing information. Results highlight that arsenic concentrations of groundwater are influenced by type of aquifer, groundwater flow path, arsenic content of the aquifer rocks, and interaction with fluids rising from depth. Waters circulating in the Vico volcanics, one of the prominent rock units of the area, have high concentrations of arsenic, both for the basal OPEN ACCESSWater 2015, 7 5092 and the perched aquifers. A large fraction of the waters associated with this rock unit have arsenic contents higher than 10 μg/L (82 percent for basal, 40 percent for perched). In contrast, waters circulating in the Cimino volcanics have lower arsenic contents: 30 percent of the basal and 10 percent of the perched aquifers have arsenic concentrations greater than 10 μg/L. Through an integrated approach, including leaching tests to investigate the arsenic behavior concerning the water-rock interaction and a geostatistical modeling of data, it has been possible to identify and tentatively quantify suitable water resources that have arsenic content not exceeding the quality standards for human consumption.

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Section: Geological and Hydrogeological Frameworkmentioning

confidence: 66%

Section: Materials Data and Methodsmentioning

confidence: 99%

Section: Geological and Hydrogeological Frameworkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Integrated Approach to Identify Water Resources for Human Consumption in an Area Affected by High Natural Arsenic Content

Armiento

Baiocchi

Cremisini

et al. 2015

Water

Self Cite

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“…PCA of major ions and trace elements has been used to evaluate recharge in a karst aquifer and groundwater flow in a regional aquifer (Moore et al, 2009;Stetzenbach et al, 1999, respectively). Angelone et al (2009) used PCA of major ions and trace elements from wells in an area of 900 km 2 to verify the source of arsenic-rich water. However, to the best of our knowledge, PCA has never been used to analyze time-and depthdependent hydrochemical data sets from a single deep well.…”

Section: Introductionmentioning

confidence: 99%

Characterization of deep aquifer dynamics using principal component analysis of sequential multilevel data

Kurtzman

Netzer

Weisbrod

et al. 2012

Hydrol. Earth Syst. Sci.

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Abstract. Two sequential multilevel profiles were obtained in an observation well opened to a 130-m thick, unconfined, contaminated aquifer in Tel Aviv, Israel. While the general profile characteristics of major ions, trace elements, and volatile organic compounds were maintained in the two sampling campaigns conducted 295 days apart, the vertical locations of high concentration gradients were shifted between the two profiles. Principal component analysis (PCA) of the chemical variables resulted in a first principal component which was responsible for ∼60 % of the variability, and was highly correlated with depth. PCA revealed three distinct depth-dependent water bodies in both multilevel profiles, which were found to have shifted vertically between the sampling events. This shift cut across a clayey bed which separated the top and intermediate water bodies in the first profile, and was located entirely within the intermediate water body in the second profile. Continuous electrical conductivity monitoring in a packed-off section of the observation well revealed an event in which a distinct water body flowed through the monitored section (v ∼ 150 m yr −1 ). It was concluded that the observed changes in the profiles result from dominantly lateral flow of water bodies in the aquifer rather than vertical flow. The significance of this study is twofold: (a) it demonstrates the utility of sequential multilevel observations from deep wells and the efficacy of PCA for evaluating the data; (b) the fact that distinct water bodies of 10 to 100 m vertical and horizontal dimensions flow under contaminated sites, which has implications for monitoring and remediation.

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Conceptual Geological Models, Its Importance in Interpreting Vadose Zone Hydrology and the Implications of Being Excluded

Dippenaar

Rooy

2014

Engineering Geology for Society and Territory - Volume 6

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Influence of hydrostratigraphy and structural setting on the arsenic occurrence in groundwater of the Cimino-Vico volcanic area (central Italy)

Cited by 66 publications

References 35 publications

An Integrated Approach to Identify Water Resources for Human Consumption in an Area Affected by High Natural Arsenic Content

An Integrated Approach to Identify Water Resources for Human Consumption in an Area Affected by High Natural Arsenic Content

Characterization of deep aquifer dynamics using principal component analysis of sequential multilevel data

Conceptual Geological Models, Its Importance in Interpreting Vadose Zone Hydrology and the Implications of Being Excluded

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